Partsam 2-pack 4-inch Waterproof Backup Light | 12 LED White Flange Mount

Overview

Upgrade your vehicle’s signaling with Partsam’s 2-pack 4-inch waterproof backup lights. Designed for trucks, trailers, RVs, and boats, these compact white LED modules provide bright, reliable lighting for backup, braking, and tail signaling in challenging conditions.

Each unit nests 12 LEDs behind a clear acrylic lens, delivering a crisp, even glow. The lens is sonic welded to the housing to form a single waterproof unit. Note: the trim is not removable, which helps keep out dust and moisture during demanding journeys.

Key features

• Two white sealed backup lights included in the set, built for all-weather use
• 12 high-brightness LEDs per light for clear visibility across signaling tasks
• Acrylic lens bonded to the housing for a durable, watertight unit
• Trim is not removable, reducing exposure to the elements
• Rugged all-weather plastic housing with corrosion-resistant lens

Dimensions, mounting, and wiring

• Outer diameter: 140 mm (5.5 inches); inner diameter: 105 mm (4.1 inches); height: 24 mm (0.9 inches)
• Drilling required for mounting; hole distance: 104 mm (4 inches)
• Hardwired with three wires: white = ground, red = high brightness, black = low brightness
• Perfect for stop, turn, tail, brake, and reverse signaling on a variety of vehicles
• 2-pack suited for twin-light configurations on trailers, RVs, and boats

Real-world use and installation tips

These lights are well suited for replacing aging housings on utility trailers, enhancing RV rear visibility at night, or equipping a boat trailer for safer docking and maneuvering in low light. The three-wire setup offers flexible control over brightness levels to match your signaling needs. When planning an upgrade, verify that your mounting hole pattern aligns with the 104 mm standard and ensure a proper sealed connection to protect against splash and spray.

While designed for resilience in rain, salt spray, and road grime, effective performance also relies on correct wiring and secure mounting. Consider using weatherproof sealing compounds at the mounting surface and route wires away from sharp edges to prolong life in tough environments.